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A self-adaptive sampling circuit and method for AC and DC voltage and current signals

An adaptive sampling, AC and DC voltage technology, applied in the measurement of current/voltage, measurement of electrical variables, program control, etc., can solve problems such as poor adaptive ability, increase power consumption, avoid power consumption, and have a high degree of automation Effect

Active Publication Date: 2022-01-07
XUJI GRP +3
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  • Description
  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide an AC / DC voltage and current signal self-adaptive sampling circuit and method, which is used to solve the problem of manually shorting the resistance or replacing the circuit board in the prior art to realize the sampling of the AC / DC voltage signal and the AC / DC current signal. The problem of poor adaptability

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  • A self-adaptive sampling circuit and method for AC and DC voltage and current signals

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Embodiment Construction

[0021] The specific implementation manner of the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0022] The invention provides an adaptive sampling circuit for AC and DC voltage and current signals, the circuit structure diagram of which is as follows figure 1 As shown, it includes a sampling branch and a sampling processing circuit, the sampling branch and the sampling terminal of the sampling processing circuit are connected in parallel, and the parallel connection point between the sampling branch and the sampling processing circuit is used to connect the sampling signal. Wherein, a resistor R1 with controllable resistance and a diode D1 are arranged in series in the sampling branch, and a first control switch K1 for short-circuiting the diode D1 is connected in parallel at both ends of the diode D1, and the sampling processing circuit includes a control change resistor R1 The first control terminal of the resis...

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Abstract

The invention relates to an adaptive sampling circuit and method for AC / DC voltage and current signals, wherein the adaptive sampling circuit includes a sampling branch circuit and a sampling processing circuit, the sampling branch circuit is connected in parallel with the sampling terminal of the sampling processing circuit; the sampling branch circuit is connected with the sampling terminal of the sampling processing circuit The parallel connection point of the sampling processing circuit is used to connect the sampling signal; a resistor with controllable resistance and a diode are arranged in series in the sampling branch, and a first control switch is connected in parallel at both ends of the diode; the sampling processing circuit includes a control switch for controlling the change of the resistor The first control terminal of the resistance value and the second control terminal for controlling the on-off of the first control switch. The invention automatically recognizes the type of the input signal through the voltage change at both ends of the resistor, and adaptively collects the AC and DC voltage signals and AC and DC current signals without power-off operation, thereby ensuring continuous operation of the equipment.

Description

technical field [0001] The invention relates to an AC / DC voltage and current signal self-adaptive sampling circuit and method, belonging to the technical field of sampling circuits. Background technique [0002] At present, common signal sampling circuits can only sample AC voltage signals or AC current signals, or can only sample DC voltage signals or DC current signals. It can be realized by shorting the resistance or replacing the circuit board, the application is not flexible, and the adaptability is not strong. Contents of the invention [0003] The purpose of the present invention is to provide an adaptive sampling circuit and method for AC and DC voltage and current signals, which is used to solve the problem of manually shorting the resistance or replacing the circuit board in the prior art to realize the sampling of AC and DC voltage signals and AC and DC current signals. The problem of poor adaptability. [0004] In order to solve the above technical problems, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G05B19/042
CPCG05B19/0423G01R19/00
Inventor 王志鹏王振华周俊华王全海贺渊明张改杰宋一丁宋海飞陈号
Owner XUJI GRP